Temporary removable solvent based protective coating

Abstract

This invention is for a composition of clear or pigmented coating that is temporary and removable. It is especially designed to protect the surface of an automobile from the damaging effects of the environment and also from damage caused by normal daily use. The coating is a composition of 40 to 80% of cellulose acetate butyrate ester, 15 to 60% of an acrylic polymer and 2 to 10% of a sucrose acetate isobutyrate. The remover is a combination of tetrahydrofurfuryl alcohol, dibasic ester, diacetone alcohol, ethyl 3 ethoxypropionate; 2,2,4 trimethyl-1,3 pentanoldiol monoisobutyrate, and white mineral oil.

What is claimed: 
     
       1. A process for protecting a surface of a substrate, comprising
 A) applying a formulation to the surface, wherein the formulation comprises the following ingredients in a solvent comprising at least one alcohol:
 i) cellulose acetate butyrate ester at 40 to 80% dry weight of the total dry weight of the formulation; 
 ii) at least one acrylic polymer at 15 to 60% dry weight of the total dry weight of the formulation; and 
 iii) sucrose acetate isobutyrate at 2 to 10% dry weight of the total dry weight of the formulation; and 
 
 B) drying the formulation to form a temporary removable dry coating on the surface, wherein the substrate is an automobile, vehicle capable of moving, marine or aeronautical craft, equipment or machinery, 
 wherein the at least one acrylic polymer is a methyl methacrylate and n-butyl methacrylate copolymer. 
 
     
     
       2. The process of  claim 1 , wherein the cellulose acetate butyrate ester has a hydroxyl content of approximately 3 to 6% by dry weight of the cellulose acetate butyrate ester. 
     
     
       3. The process of  claim 2 , wherein the cellulose acetate butyrate ester is CAB 553-0.4, wherein CAB 553-0.4 is a cellulose acetate butyrate having, on the average, butyryl content of about 46 wt %, acetyl content of about 2 wt %, hydroxyl content of about 4.8 wt %, glass transition temperature of about 136° C., melting point of about 150-160° C., and molecular weight of about 20,000. 
     
     
       4. The process of  claim 2 , wherein the cellulose acetate butyrate ester is CAB 531.1, wherein CAB 531.1 is a cellulose acetate butyrate having, on the average, butyryl content of about 50 wt %, acetyl content of about 3 wt %, hydroxyl content of about 1.7 wt %, melting point of about 135-150° C., glass transition temperature of about 115° C., and molecular weight of about 40,000. 
     
     
       5. The process of  claim 1 , wherein the at least one acrylic polymer is selected from NeoCryl B-734, NeoCryl B-734, BR-106, and mixtures thereof, wherein NeoCryl B-734 is a methyl methacrylate and n-butyl methacrylate copolymer having an average molecular weight of 105,000, a glass transition temperature of 45° C. and an acid value of zero; NeoCryl B-723 is a methyl methacrylate and n-butyl methacrylate copolymer having a molecular weight of about 200,000, a glass transition temperature of 48° C. and an acid value of 5.5; and BR-106 is a methyl methacrylate and n-butyl methacrylate copolymer having a molecular weight of approximately 60,000, a glass transition temperature of 58° C. and an acid value of 3.0. 
     
     
       6. The process of  claim 5 , wherein the at least one acrylic polymer is NeoCryl B-734. 
     
     
       7. The process of  claim 5 , wherein the at least one acrylic polymer is NeoCryl B-723. 
     
     
       8. The process of  claim 5 , wherein the at least one acrylic polymer is BR-106. 
     
     
       9. The process of  claim 1 , wherein the solvent comprises methanol, ethanol, isopropyl alcohol, n-propyl alcohol, diacetone alcohol or a mixture thereof. 
     
     
       10. The process of  claim 9 , wherein the solvent comprises a mixture of isopropyl alcohol and diacetone alcohol. 
     
     
       11. The process of  claim 1 , wherein the solvent further comprises at least one glycol ether. 
     
     
       12. The process of  claim 11 , wherein the glycol ethers comprises ethylene glycol n-butyl ether. 
     
     
       13. The process of  claim 1 , wherein the solvent comprises ethyl alcohol, isopropyl alcohol, diacetone alcohol, propylene glycol monomethyl ether acetate, tetrahydrofurfuryl alcohol and ethyl 3-ethoxypropionate. 
     
     
       14. The process of  claim 13 , wherein the solvent comprises approximately 20 to 30 weight % ethyl alcohol, approximately 10 to 12 weight % isopropyl alcohol, approximately 10 to 20 weight % diacetone alcohol, approximately 10 to 20 weight % propylene glycol monomethyl ether acetate, approximately 2 to 5 weight % tetrahydrofurfuryl alcohol and approximately 2 to 5 weight % ethyl 3-ethoxypropionate. 
     
     
       15. The process of  claim 14 , wherein the solvent comprises approximately 26 weight % ethyl alcohol, approximately 11 weight % isopropyl alcohol, approximately 15 weight % diacetone alcohol, approximately 15 weight % propylene glycol monomethyl ether acetate, approximately 4 weight % tetrahydrofurfuryl alcohol and approximately 4 weight % ethyl 3-ethoxypropionate. 
     
     
       16. The process of  claim 1 , wherein the formulation further comprises a pigment. 
     
     
       17. The process of  claim 16 , wherein the pigment is metalized. 
     
     
       18. The process of  claim 16 , wherein the dry coating of the formulation makes a temporary removable sign on the surface. 
     
     
       19. The process of  claim 1 , wherein the formulation further comprises a flow improver at 0.1 weight % to 1 weight % of the total dry weight of the formulation. 
     
     
       20. The process of  claim 19 , wherein the flow improver is a fluorocarbon, low molecular weight acrylic, or surfactant. 
     
     
       21. The process of  claim 19 , wherein the flow improver added is a polyether modified polydimethylsiloxane. 
     
     
       22. The process of  claim 1 , wherein the formulation further comprises a light stabilizer at 0.1 weight % to 2 weight % of the total dry weight of the formulation. 
     
     
       23. The process of  claim 22 , wherein the light stabilizer is a mixture of bis(1,2,2,6,6-pentamethyl-4-piperidyl) sebacate, and methyl (1,2,2,6,6-pentamethyl-4-piperidyl) sebacate. 
     
     
       24. The process of  claim 22 , wherein the light stabilizer is benzotriazole. 
     
     
       25. The process of  claim 22 , wherein the light stabilizer is a combination of bis(1,2,2,6,6-pentamethyl-4-piperidyl) sebacate, methyl (1,2,2,6,6-pentamethyl-4-piperidyl) sebacate and benzotriazole. 
     
     
       26. The process of  claim 1 , wherein the cellulose acetate butyrate ester in step (A) is used in an amount of approximately 68% by dry weight of the formulation, and the at least one acrylic polymer is a mixture of: a higher molecular weight methyl methacrylate and n-butyl methacrylate copolymer in an amount of approximately 15% by dry weight of the formulation and a combination of lower molecular weight copolymer of methyl methacrylate and n-butyl methacrylate in an amount of approximately 10% by dry weight of the formulation. 
     
     
       27. The process of  claim 1 , wherein the surface is painted. 
     
     
       28. The process of  claim 27 , wherein the formulation is pigmented or colored to match the existing color and gloss of the painted surface. 
     
     
       29. The process of  claim 27 , wherein the dry coating is buffed and compounded. 
     
     
       30. The process of  claim 1 , wherein the formulation is applied in step A) via spraying, screen printing or roller. 
     
     
       31. The process of  claim 1 , wherein the formulation is applied by spraying in step A). 
     
     
       32. The process of  claim 1 , further comprising removing the dry coating after step B). 
     
     
       33. The process of  claim 32 , wherein the dry coating is removed by applying a remover composition comprising comprising:
 a) 50 to 80 weight % tetrahydrofurfuryl alcohol; 
 b) 5 to 20 weight % dibasic ester; 
 c) 1 to 12 weight % diacetone alcohol; 
 d) 1 to 12 weight % ethyl 3-ethoxypropionate; and 
 e) 1 to 12 weight % 2,2,4 trimethyl-1,3 pentanediol monoisobutyrate; 
 f) 1 to 10 weight % white mineral oil; 
 g) 0.25 to 2.0 weight % surfactant; and 
 h) 0.25 to 4.0 weight % thickening agent; 
 wherein the weight % is based on the total dry weight of the remover composition.